Device for detecting concave-convex of flange face of wheel

ABSTRACT

A device for detecting concave-convex of a flange face of a wheel is composed of a frame, a jacking cylinder, lower guide posts, a lifting table, a support column, an inner ring adjusting cylinder I, an inner ring guide rail, an inner ring adjusting cylinder II, an inner ring sliding block I, an inner ring sliding block II, an electric cylinder I, an electric cylinder II, a detection bar I, a detection bar II, piezoelectric sensors, an outer ring adjusting cylinder I, an outer ring adjusting cylinder II, an outer ring guide rail I, an outer ring guide rail II, an outer ring sliding block I, an outer ring sliding block II, an electric cylinder III, an electric cylinder IV, a detection bar III, a detection bar IV and the like.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is filed based upon and claims priority to Chinese Patent Application No. 201711402516.9, filed on Dec. 22, 2017, the entire contents of which are incorporated herein by reference.

BACKGROUND

A flange face of a wheel involves in cooperation during mounting, and the flange face must be concave but not convex according to the process requirement. In actual production, the common detection method, which is spot check with an artificial knife straight edge or with three coordinates, cannot satisfy 100% detection in automatic continuous production. Based on the current situation, the present patent provides a device for quickly detecting whether a flange face of a wheel is concave, which can be used for 100% detection in automatic production.

SUMMARY

The disclosure relates to the technical field of wheel detection, and specifically, to a device for detecting whether a flange face of a wheel is concave.

A device for quickly detecting concave-convex of a flange face of a wheel is provided, which can be used for 100% detection in automatic production. The device is advanced, stable, efficient and high in degree of automation.

A device for detecting concave-convex of a flange face of a wheel is composed of a frame, a jacking cylinder, lower guide posts, a lifting table, a support column, an inner ring adjusting cylinder I, an inner ring guide rail, an inner ring adjusting cylinder II, an inner ring sliding block I, an inner ring sliding block II, an electric cylinder I, an electric cylinder II, a detection bar I, a detection bar II, piezoelectric sensors, an outer ring adjusting cylinder I, an outer ring adjusting cylinder II, an outer ring guide rail I, an outer ring guide rail II, an outer ring sliding block I, an outer ring sliding block II, an electric cylinder III, an electric cylinder IV, a detection bar III, a detection bar IV, a positioning cylinder, a left sliding plate, a right sliding plate, a gear rack I, positioning columns, an upper cylinder, a mobile platform, upper guide posts, a servo motor, a rotating table, a clamping guide rail, a clamping cylinder, a right sliding table, a gear rack II, a left sliding table, clamping arms and clamping jaws.

The positioning cylinder is fixed on the frame, the output end of the positioning cylinder is connected with the left sliding plate, the left sliding plate and the right sliding plate are mounted on a guide rail and connected with each other via the gear rack I, and the four positioning columns are symmetrically mounted on the left sliding plate and the right sliding plate. The positioning cylinder is started to drive the left sliding plate and the right sliding plate to move synchronously, and a wheel can be pre-positioned on a roller bed via the positioning columns.

The four lower guide posts are fixed at the bottom of the frame, the jacking cylinder is fixed in the center of the bottom of the frame, the output end of the jacking cylinder is connected with the lifting table, and the support column is mounted on the lifting table. After the wheel is pre-positioned, the positioning columns are reset, the jacking cylinder is started to drive the support column to move up, and the support column can jack the wheel after contacting a flange face of the wheel, so that the inner rim of the wheel leaves the roller bed.

The upper cylinder is fixed above the frame, the output end of the upper cylinder is connected with the mobile platform, and the upper cylinder can control the mobile platform to move up and down under the guidance of the four upper guide posts. The servo motor is fixed on the mobile platform via a mounting rack, the output end of the servo motor is connected with the rotating table, the clamping guide rail is fixed on the rotating table, and the left sliding table and the right sliding table are symmetrically mounted on the clamping guide rail and connected with each other via the gear rack II. The clamping cylinder is fixed on the rotating table, the output end of the clamping cylinder is connected with the right sliding table, the four clamping arms are symmetrically mounted on the left sliding table and the right sliding table, and a clamping jaw is mounted at the tail end of each clamping arm. When the wheel is jacked certain height by the support column, the upper cylinder is started to drive the mobile platform to move down, the four clamping jaws are located outside the inner rim of the wheel, then the clamping cylinder is started to drive the left sliding table and the right sliding table to move synchronously, the inner rim of the wheel is clamped by the clamping jaws, and the wheel is thus positioned and clamped. Since the inner rim of the wheel and the flange face of the wheel are machined on a first-procedure lathe, high-precision positioning of the wheel at the moment is realized before detection.

A transverse groove and two longitudinal grooves are formed inside the support column, the inner ring adjusting cylinder I and the inner ring adjusting cylinder II are symmetrically mounted in the transverse groove, the output end of the inner ring adjusting cylinder I is connected with the inner ring sliding block I, the output end of the inner ring adjusting cylinder II is connected with the inner ring sliding block II, and both the inner ring sliding block I and the inner ring sliding block II are mounted on the inner ring guide rail. The electric cylinder I is mounted on the inner ring sliding block I, the detection bar I is mounted at the output end of the electric cylinder I, and a piezoelectric sensor is mounted on the detection bar I; the electric cylinder II is mounted on the inner ring sliding block II, the detection bar II is mounted at the output end of the electric cylinder II, and a piezoelectric sensor is mounted on the detection bar II. The detection bar I and the detection bar II are used for detecting the inner ring of a flange of the wheel, and the distance between the detection bar I and the detection bar II can be adjusted via the inner ring adjusting cylinder I and the inner ring adjusting cylinder II, so that the inner rings of multiple flange diameters can be detected, and the universality is wider.

The outer ring adjusting cylinder I and the outer ring adjusting cylinder II are symmetrically mounted in the longitudinal grooves, the output end of the outer ring adjusting cylinder I is connected with the outer ring sliding block I, the output end of the outer ring adjusting cylinder II is connected with the outer ring sliding block II, the outer ring sliding block I is mounted on the outer ring guide rail I, and the outer ring sliding block II is mounted on the outer ring guide rail II. The electric cylinder III is mounted on the outer ring sliding block I, the detection bar III is mounted at the output end of the electric cylinder III, and a piezoelectric sensor is mounted on the detection bar III; the electric cylinder IV is mounted on the outer ring sliding block II, the detection bar IV is mounted at the output end of the electric cylinder IV, and a piezoelectric sensor is mounted on the detection bar IV. The detection bar III and the detection bar IV are used for detecting the outer ring of the flange of the wheel, and the distance between the detection bar III and the detection bar IV can be adjusted via the outer ring adjusting cylinder I and the outer ring adjusting cylinder II, so that the outer rings of multiple flange diameters can be detected, and the universality is wider.

When the flange of the wheel is concave, the inner ring of the flange face is low, and the outer ring is high. When the detection bar I, the detection bar II, the detection bar III and the detection bar IV which have equal height simultaneously approach the flange face, the detection bar III and the detection bar IV receive signals from the piezoelectric sensors first due to the high outer ring, then the detection bar I and the detection bar II receive signals from the piezoelectric sensors due to the low inner ring, and the flange of the wheel is judged to be concave in such a way that the time when the detection bar I and the detection bar II receive signals is later than the time when the detection bar III and the detection bar IV receive signals.

When the flange of the wheel is convex, the inner ring of the flange face is high, and the outer ring is low. When the detection bar I, the detection bar II, the detection bar III and the detection bar IV which have equal height simultaneously approach the flange face, the detection bar I and the detection bar II receive signals from the piezoelectric sensors first due to the high inner ring, then the detection bar III and the detection bar IV receive signals from the piezoelectric sensors due to the low outer ring, and the convex flange of the wheel is judged in such a way that the time when the detection bar I and the detection bar II receive signals is earlier than the time when the detection bar III and the detection bar IV receive signals.

After the wheel is clamped and positioned by the clamping jaws, the upper cylinder is started to drive the mobile platform to move up certain distance, at the moment, the flange face of the wheel leaves the support column, next, the electric cylinder I, the electric cylinder II, the electric cylinder III and the electric cylinder IV are simultaneously started, the detection bar I, the detection bar II, the detection bar III and the detection bar IV which have equal height simultaneously approach the flange face, and whether the flange of the wheel is concave or convex is judged via the sequence of time when the detection bar I and the detection bar II receive signals and time when the detection bar III and the detection bar IV receive signals. The detection bar I, the detection bar II, the detection bar III and the detection bar IV are oblong, and the lengths of the detection bars are required to be greater than the width of a drainage channel, thus eliminating the influence of the flange drainage channel on the detection result. After the detection is completed the once, all the detection bars are reset, the servo motor is started to drive the clamped wheel to rotate certain angle, and then the wheel is redetected via the detection bars. After multiple times of redetection, when all the detection results are concave, the flange face of the wheel is judged to be concave, otherwise, the flange face of the wheel is convex.

The working process of the device for detecting concave-convex of the flange face of the wheel is: firstly, according to the flange face of the wheel produced on line, the distance between the detection bar I and the detection bar II and the distance between the detection bar III and the detection bar IV are adjusted; after the wheel enters the device, the positioning cylinder is started to drive the left sliding plate and the right sliding plate to move synchronously, and the wheel is pre-positioned on the roller bed via the positioning columns; after the wheel is pre-positioned, the positioning columns are reset, the jacking cylinder is started to drive the support column to move up, and the support column can jack the wheel after contacting the flange face of the wheel, so that the inner rim of the wheel leaves the roller bed; when the wheel is jacked certain height by the support column, the upper cylinder is started to drive the mobile platform to move down, the four clamping jaws are located outside the inner rim of the wheel, then the clamping cylinder is started to drive the left sliding table and the right sliding table to move synchronously, the inner rim of the wheel is clamped by the clamping jaws, the wheel is thus positioned and clamped, and high-precision positioning of the wheel at the moment is realized before detection; after the wheel is clamped and positioned by the clamping jaws, the upper cylinder is started to drive the mobile platform to move up certain distance, and at the moment, the flange face of the wheel leaves the support column; next, the electric cylinder I, the electric cylinder II, the electric cylinder III and the electric cylinder IV are simultaneously started, the detection bar I, the detection bar II, the detection bar III and the detection bar IV which have equal height simultaneously approach the flange face, and the flange of the wheel is judged to be concave in such a way that the time when the detection bar I and the detection bar II receive signals is later than the time when the detection bar III and the detection bar IV receive signals; and the flange of the wheel is judged to be convex in such a way that the time when the detection bar I and the detection bar II receive signals is earlier than the time when the detection bar III and the detection bar IV receive signals. After the detection is completed the once, the four detection bars are reset, the servo motor is started to drive the clamped wheel to rotate certain angle, and then the wheel is redetected via the detection bars. After multiple times of redetection, when all the detection results are concave, the flange face of the wheel is judged to be concave, otherwise, the flange face of the wheel is convex. Finally, after the detection, the four detection bars are reset, the clamping jaws loosen the wheel, and the wheel falls back to the roller bed via the support column and rotates downward

The disclosure can be used for 100% detection about whether a flange face is concave in automatic production, and has the characteristics of advanced process, high stability and efficiency, high automation degree and the like.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a front view of a device for detecting concave-convex of a flange face of a wheel in the disclosure.

FIG. 2 is a left view of the device for detecting concave-convex of the flange face of the wheel in the disclosure.

FIG. 3 is a top view of the device for detecting concave-convex of the flange face of the wheel in the disclosure.

FIG. 4 is a partial front view of a detection part of the device for detecting concave-convex of the flange face of the wheel in the disclosure.

FIG. 5 is a partial left view of the detection part of the device for detecting concave-convex of the flange face of the wheel in the disclosure.

FIG. 6 is a partial top view of the detection part of the device for detecting concave-convex of the flange face of the wheel in the disclosure.

In which, 1—frame, 2—jacking cylinder, 3—lower guide post, 4—lifting table, 5—support column, 6—inner ring adjusting cylinder I, 7—inner ring guide rail, 8—inner ring adjusting cylinder II, 9—inner ring sliding block I, 10—inner ring sliding block II, 11—electric cylinder I, 12—electric cylinder II, 13—detection bar I, 14—detection bar II, 15—piezoelectric sensor, 16—outer ring adjusting cylinder I, 17—outer ring adjusting cylinder II, 18—outer ring guide rail I, 19—outer ring guide rail II, 20—outer ring sliding block I, 21—outer ring sliding block II, 22—electric cylinder III, 23—electric cylinder IV, 24—detection bar III, 25—detection bar IV, 26—positioning cylinder, 27—left sliding plate, 28—right sliding plate, 29—gear rack I, 30—positioning column, 31—upper cylinder, 32—mobile platform, 33—upper guide post, 34—servo motor, 35—rotating table, 36—clamping guide rail, 37—clamping cylinder, 38—right sliding table, 39—gear rack II, 40—left sliding table, 41—clamping arm, 42—clamping jaw.

DETAILED DESCRIPTION

Specific details and working conditions of a device provided by the disclosure will be given below in combination with the accompanying drawings.

A device for detecting concave-convex of a flange face of a wheel is composed of a frame 1, a jacking cylinder 2, lower guide posts 3, a lifting table 4, a support column 5, an inner ring adjusting cylinder I 6, an inner ring guide rail 7, an inner ring adjusting cylinder II 8, an inner ring sliding block I 9, an inner ring sliding block II 10, an electric cylinder I 11, an electric cylinder II 12, a detection bar I 13, a detection bar II 14, piezoelectric sensors 15, an outer ring adjusting cylinder I 16, an outer ring adjusting cylinder II 17, an outer ring guide rail I 18, an outer ring guide rail II 19, an outer ring sliding block I 20, an outer ring sliding block II 21, an electric cylinder III 22, an electric cylinder IV 23, a detection bar III 24, a detection bar IV 25, a positioning cylinder 26, a left sliding plate 27, a right sliding plate 28, a gear rack I 29, positioning columns 30, an upper cylinder 31, a mobile platform 32, upper guide posts 33, a servo motor 34, a rotating table 35, a clamping guide rail 36, a clamping cylinder 37, a right sliding table 38, a gear rack II 39, a left sliding table 40, clamping arms 41 and clamping jaws 42.

The positioning cylinder 26 is fixed on the frame 1, the output end of the positioning cylinder 26 is connected with the left sliding plate 27, the left sliding plate 27 and the right sliding plate 28 are mounted on a guide rail and connected with each other via the gear rack I 29, and the four positioning columns 30 are symmetrically mounted on the left sliding plate 27 and the right sliding plate 28. The positioning cylinder 26 is started to drive the left sliding plate 27 and the right sliding plate 28 to move synchronously, and a wheel can be pre-positioned on a roller bed via the positioning columns 30.

The four lower guide posts 3 are fixed at the bottom of the frame 1, the jacking cylinder 2 is fixed in the center of the bottom of the frame 1, the output end of the jacking cylinder 2 is connected with the lifting table 4, and the support column 5 is mounted on the lifting table 4. After the wheel is pre-positioned, the positioning columns 30 are reset, the jacking cylinder 2 is started to drive the support column 5 to move up, and the support column 5 can jack the wheel after contacting a flange face of the wheel, so that the inner rim of the wheel leaves the roller bed.

The upper cylinder 31 is fixed above the frame 1, the output end of the upper cylinder 31 is connected with the mobile platform 32, and the upper cylinder 31 can control the mobile platform 32 to move up and down under the guidance of the four upper guide posts 33. The servo motor 34 is fixed on the mobile platform 32 via a mounting rack, the output end of the servo motor 34 is connected with the rotating table 35, the clamping guide rail 36 is fixed on the rotating table 35, and the left sliding table 40 and the right sliding table 38 are symmetrically mounted on the clamping guide rail 36 and connected with each other via the gear rack II 39. The clamping cylinder 37 is fixed on the rotating table 35, the output end of the clamping cylinder 37 is connected with the right sliding table 38, the four clamping arms 41 are symmetrically mounted on the left sliding table 40 and the right sliding table 38, and a clamping jaw 42 is mounted at the tail end of each clamping arm 41. When the wheel is jacked certain height by the support column 5, the upper cylinder 31 is started to drive the mobile platform 32 to move down, the four clamping jaws 42 are located outside the inner rim of the wheel, then the clamping cylinder 37 is started to drive the left sliding table 40 and the right sliding table 38 to move synchronously, the inner rim of the wheel is clamped by the clamping jaws 42, and the wheel is thus positioned and clamped. Since the inner rim of the wheel and the flange face of the wheel are machined on a first-procedure lathe, high-precision positioning of the wheel at the moment is realized before detection.

A transverse groove and two longitudinal grooves are formed inside the support column 5, the inner ring adjusting cylinder I 6 and the inner ring adjusting cylinder II 8 are symmetrically mounted in the transverse groove, the output end of the inner ring adjusting cylinder I 6 is connected with the inner ring sliding block I 9, the output end of the inner ring adjusting cylinder II 8 is connected with the inner ring sliding block II 10, and both the inner ring sliding block I 9 and the inner ring sliding block II 10 are mounted on the inner ring guide rail 7. The electric cylinder I 11 is mounted on the inner ring sliding block I 9, the detection bar I 13 is mounted at the output end of the electric cylinder I 11, and a piezoelectric sensor 15 is mounted on the detection bar I 13; the electric cylinder II 12 is mounted on the inner ring sliding block II 10, the detection bar II 14 is mounted at the output end of the electric cylinder II 12, and a piezoelectric sensor 15 is mounted on the detection bar II 14. The detection bar I 13 and the detection bar II 14 are used for detecting the inner ring of a flange of the wheel, and the distance between the detection bar I 13 and the detection bar II 14 can be adjusted via the inner ring adjusting cylinder I 6 and the inner ring adjusting cylinder II 8, so that the inner rings of multiple flange diameters can be detected, and the universality is wider.

The outer ring adjusting cylinder I 16 and the outer ring adjusting cylinder II 17 are symmetrically mounted in the longitudinal grooves, the output end of the outer ring adjusting cylinder I 16 is connected with the outer ring sliding block I 20, the output end of the outer ring adjusting cylinder II 17 is connected with the outer ring sliding block II 21, the outer ring sliding block I 20 is mounted on the outer ring guide rail I 18, and the outer ring sliding block II 21 is mounted on the outer ring guide rail II 19. The electric cylinder III 22 is mounted on the outer ring sliding block I 20, the detection bar III 24 is mounted at the output end of the electric cylinder III 22, and a piezoelectric sensor 15 is mounted on the detection bar III 24; the electric cylinder IV 23 is mounted on the outer ring sliding block II 21, the detection bar IV 25 is mounted at the output end of the electric cylinder IV 23, and a piezoelectric sensor 15 is mounted on the detection bar IV 25. The detection bar III 24 and the detection bar IV 25 are used for detecting the outer ring of the flange of the wheel, and the distance between the detection bar III 24 and the detection bar IV 25 can be adjusted via the outer ring adjusting cylinder I 16 and the outer ring adjusting cylinder II 17, so that the outer rings of multiple flange diameters can be detected, and the universality is wider.

When the flange of the wheel is concave, the inner ring of the flange face is low, and the outer ring is high. When the detection bar I 13, the detection bar II 14, the detection bar III 24 and the detection bar IV 25 which have equal height simultaneously approach the flange face, the detection bar III 24 and the detection bar IV 25 receive signals from the piezoelectric sensors 15 first due to the high outer ring, then the detection bar I 13 and the detection bar II 14 receive signals from the piezoelectric sensors 15 due to the low inner ring, and the flange of the wheel is judged to be concave in such a way that the time when the detection bar I 13 and the detection bar II 14 receive signals is later than the time when the detection bar III 24 and the detection bar IV 25 receive signals.

When the flange of the wheel is convex, the inner ring of the flange face is high, and the outer ring is low. When the detection bar I 13, the detection bar II 14, the detection bar III 24 and the detection bar IV 25 which have equal height simultaneously approach the flange face, the detection bar I 13 and the detection bar II 14 receive signals from the piezoelectric sensors 15 first due to the high inner ring, then the detection bar III 24 and the detection bar IV 25 receive signals from the piezoelectric sensors 15 due to the low outer ring, and the convex flange of the wheel is judged in such a way that the time when the detection bar I 13 and the detection bar II 14 receive signals is earlier than the time when the detection bar III 24 and the detection bar IV 25 receive signals.

After the wheel is clamped and positioned by the clamping jaws 42, the upper cylinder 31 is started to drive the mobile platform 32 to move up certain distance, at the moment, the flange face of the wheel leaves the support column 5, next, the electric cylinder I 11, the electric cylinder II 12, the electric cylinder III 22 and the electric cylinder IV 23 are simultaneously started, the detection bar I 13, the detection bar II 14, the detection bar III 24 and the detection bar IV 25 which have equal height simultaneously approach the flange face, and whether the flange of the wheel is concave or convex is judged via the sequence of time when the detection bar I 13 and the detection bar II 14 receive signals and time when the detection bar III 24 and the detection bar IV 25 receive signals. The detection bar I 13, the detection bar II 14, the detection bar III 24 and the detection bar IV 25 are oblong, and the lengths of the detection bars are required to be greater than the width of a drainage channel, thus eliminating the influence of the flange drainage channel on the detection result. After the detection is completed the once, all the detection bars are reset, the servo motor 34 is started to drive the clamped wheel to rotate certain angle, and then the wheel is redetected via the detection bars. After multiple times of redetection, when all the detection results are concave, the flange face of the wheel is judged to be concave, otherwise, the flange face of the wheel is convex.

The working process of the device for detecting concave-convex of the flange face of the wheel is: firstly, according to the flange face of the wheel produced on line, the distance between the detection bar I 13 and the detection bar II 14 and the distance between the detection bar III 24 and the detection bar IV 25 are adjusted; after the wheel enters the device, the positioning cylinder 26 is started to drive the left sliding plate 27 and the right sliding plate 28 to move synchronously, and the wheel is pre-positioned on the roller bed via the positioning columns 30; after the wheel is pre-positioned, the positioning columns 30 are reset, the jacking cylinder 2 is started to drive the support column 5 to move up, and the support column 5 can jack the wheel after contacting the flange face of the wheel, so that the inner rim of the wheel leaves the roller bed; when the wheel is jacked certain height by the support column 5, the upper cylinder 31 is started to drive the mobile platform 32 to move down, the four clamping jaws 42 are located outside the inner rim of the wheel, then the clamping cylinder 37 is started to drive the left sliding table 40 and the right sliding table 38 to move synchronously, the inner rim of the wheel is clamped by the clamping jaws 42, the wheel is thus positioned and clamped, and high-precision positioning of the wheel at the moment is realized before detection; after the wheel is clamped and positioned by the clamping jaws 42, the upper cylinder 31 is started to drive the mobile platform 32 to move up certain distance, and at the moment, the flange face of the wheel leaves the support column 5; next, the electric cylinder I 11, the electric cylinder II 12, the electric cylinder III 22 and the electric cylinder IV 23 are simultaneously started, the detection bar I 13, the detection bar II 14, the detection bar III 24 and the detection bar IV 25 which have equal height simultaneously approach the flange face, and the flange of the wheel is judged to be concave in such a way that the time when the detection bar I 13 and the detection bar II 14 receive signals is later than the time when the detection bar III 24 and the detection bar IV 25 receive signals; and the flange of the wheel is judged to be convex in such a way that the time when the detection bar I 13 and the detection bar II 14 receive signals is earlier than the time when the detection bar III 24 and the detection bar IV 25 receive signals. After the detection is completed the once, the four detection bars are reset, the servo motor 34 is started to drive the clamped wheel to rotate certain angle, and then the wheel is redetected via the detection bars. After multiple times of redetection, when all the detection results are concave, the flange face of the wheel is judged to be concave, otherwise, the flange face of the wheel is convex. Finally, after the detection, the four detection bars are reset, the clamping jaws 42 loosen the wheel, and the wheel falls back to the roller bed via the support column 5 and rotates downward.

The device of the disclosure can be used for 100% detection about whether the flange face is concave in automatic production, and has the characteristics of advanced process, high stability and efficiency, high automation degree and the like. 

1. A device for detecting concave-convex of a flange face of a wheel is composed of a frame, a jacking cylinder, lower guide posts, a lifting table, a support column, an inner ring adjusting cylinder I, an inner ring guide rail, an inner ring adjusting cylinder II, an inner ring sliding block I, an inner ring sliding block II, an electric cylinder I, an electric cylinder II, a detection bar I, a detection bar II, piezoelectric sensors, an outer ring adjusting cylinder I, an outer ring adjusting cylinder II, an outer ring guide rail I, an outer ring guide rail II, an outer ring sliding block I, an outer ring sliding block II, an electric cylinder III, an electric cylinder IV, a detection bar III, a detection bar IV, a positioning cylinder, a left sliding plate, a right sliding plate, a gear rack I, positioning columns, an upper cylinder, a mobile platform, upper guide posts, a servo motor, a rotating table, a clamping guide rail, a clamping cylinder, a right sliding table, a gear rack II, a left sliding table, clamping arms and clamping jaws, wherein a transverse groove and two longitudinal grooves are formed inside the support column, the inner ring adjusting cylinder I and the inner ring adjusting cylinder II are symmetrically mounted in the transverse groove, the output end of the inner ring adjusting cylinder I is connected with the inner ring sliding block I, the output end of the inner ring adjusting cylinder II is connected with the inner ring sliding block II, and both the inner ring sliding block I and the inner ring sliding block II are mounted on the inner ring guide rail; the electric cylinder I is mounted on the inner ring sliding block I, the detection bar I is mounted at the output end of the electric cylinder I, and a piezoelectric sensor is mounted on the detection bar I; the electric cylinder II is mounted on the inner ring sliding block II, the detection bar II is mounted at the output end of the electric cylinder II, and a piezoelectric sensor is mounted on the detection bar II; the outer ring adjusting cylinder I and the outer ring adjusting cylinder II are symmetrically mounted in the longitudinal grooves, the output end of the outer ring adjusting cylinder I is connected with the outer ring sliding block I, the output end of the outer ring adjusting cylinder II is connected with the outer ring sliding block II, the outer ring sliding block I is mounted on the outer ring guide rail I, and the outer ring sliding block II is mounted on the outer ring guide rail II; and the electric cylinder III is mounted on the outer ring sliding block I, the detection bar III is mounted at the output end of the electric cylinder III, and a piezoelectric sensor is mounted on the detection bar III; the electric cylinder IV is mounted on the outer ring sliding block II, the detection bar IV is mounted at the output end of the electric cylinder IV, and a piezoelectric sensor is mounted on the detection bar IV, and the distance between the detection bar III and the detection bar IV can be adjusted via the outer ring adjusting cylinder I and the outer ring adjusting cylinder II, so that the outer rings of multiple flange diameters can be detected. 